Results 101 to 110 of about 1,878 (250)
Signal‐to‐noise and spatial resolution in in‐line imaging. 3. Optimization using a simple model
Journal of Synchrotron Radiation, EarlyView.Geometrical magnification and X‐ray energy are optimized with respect to spatial resolution, contrast, noise, radiation dose and other image quality characteristics. The optimization is performed using a simple theoretical model of a homogeneous edge feature embedded in a bulk uniform sample, and the resulting generic analytical expressions for image ...
Timur E. Gureyev +2 more
wiley +1 more source
Revista Técnica de la Facultad de IngenieríaResumen El efecto de la atenuación causada por obstáculos tipo “filo de cuchillo” es un importante problema de comunicación para receptores fijos y/o móviles.
Venancio Balassone, Hernán Romero
doaj
Journal of Synchrotron Radiation, EarlyView.Linear dichroic X‐ray tomography is a technique in which the linear dichroism of anisotropic materials is used to image crystal orientation in three dimensions. We show that the reconstruction of tomograms is subject to errors due to the change in polarization on propagation through the material and propose strategies for mitigating these effects ...
Matthew A. Marcus +3 more
wiley +1 more source
Defocused illumination with beam‐shaping condenser for uniform wide‐field X‐ray imaging
Journal of Synchrotron Radiation, EarlyView.A defocused illumination method based on a beam‐shaping condenser to suppress fringe artifacts arising from rectangular aperture diffraction and sub‐grating interference is developed, providing an effective and practical approach for achieving wide‐field and uniform illumination in X‐ray microscopy.The beam‐shaping condenser (BSC) has become a key ...
Kuanqiang Zhang +12 more
wiley +1 more source
Theoretical framework for soft X‐ray Fourier transform spectroscopy using the Wigner function
Journal of Synchrotron Radiation, EarlyView.A theoretical framework for the propagation of partially coherent Gaussian radiation in a modified Mach–Zehnder interferometer designed for Fourier transform spectroscopy applications is presented.This work presents a theoretical framework for the propagation of partially coherent Gaussian radiation in a modified Mach–Zehnder interferometer designed ...
Chuzida Chen +6 more
wiley +1 more source
Fraunhofer approximation of Fresnel integrals
European Journal of PhysicsAbstract A method to derive the Fraunhofer diffraction integral by making use of the theory of distributions is presented. With respect to standard textbooks, the pedagogical benefit of this method is that it uniquely uses the far-field approximation of the Fresnel diffraction integral.
K Dupraz +4 more
openaire +2 more sources
Revisiting PSF models: Unifying framework and high‐performance implementation
Journal of Microscopy, EarlyView.Abstract Localisation microscopy often relies on detailed models of point‐spread functions. For applications such as deconvolution or PSF engineering, accurate models for light propagation in imaging systems with a high numerical aperture are required. Different models have been proposed based on 2D Fourier transforms or 1D Bessel integrals.
Yan Liu +7 more
wiley +1 more source
Anales (Asociación Física Argentina), 2013 Con el fin de determinar las pérdidas de acoplamiento para resonadores inestables autofiltrantes (SFUR) se calcularon los autovalores correspondientes para distintos tipos de aberturras.
G J Fochesatto +3 more
doaj
Highly Selective Toward HER or CO2RR by Regulating Cu Single and Dual Atoms on g‐C3N4
Advanced Functional Materials, Volume 36, Issue 10, 2 February 2026.This systematic study provides insights into the design of electrocatalysts for hydrogen evolution reaction (HER) and carbon dioxide reduction (CO2RR). It serves as a useful guide for tuning catalyst architecture toward efficient multifunctional performance by varying synthetic parameters, demonstrating the impact of copper (Cu) species ranging from ...
Wan‐Ting Chen +9 more
wiley +1 more source